JPS59111165A - Image forming method - Google Patents

Abstract

PURPOSE:To form a stable, high-sensitivity picture which has high optical density and reducible density by processing a photosensitive body which has an easy-to-peel material layer by corona electrification, picture exposure, and wet toner development and then performing transfer and etching. CONSTITUTION:A photoconductive and photosensitive layer 2 of selenium, cadmium sulfide, and others and the easy-to-peel material layer 3 of silicone resin and others are formed on a base material 1 having a conductive surface. This photosensitive body is processed by corona electrification and picture exposure to form an electrostatic latent image, which is developed by using wet toner to obtain a temporarily fixed toner image 7. The tone image 7 is transferred onto an etched layer 10 on a substrate 9 through a pressure roll 8. Metallic particulates on the part where the etched layer 10 formed by dispersing metallic particulates into hydrophilic resin is not coated with the toner 7 are solved out by etching to obtain a mesh-point positive having high optical density. This positive is reducible in density by Farmer's reducer and stable.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention provides an optical density flat non-silver halide image that is capable of high performance and high optical density.
61V! V', relating to a different forming method.

flI! Salt photosensitive material Photosensitive material porosity, stability over time, optical 70
It is widely used as a +UU number forming material because it is superior to non-silver salt image forming materials in terms of strength, reduction properties, and sensitivity. However, since silver, which is the main raw material, is a sensitive metal, it is expensive, and there is also a concern that the root canal l/i will be depleted in the future.
Further development of 11JI imaging materials is underway.

Non-Takano 101711 Image-forming materials include diazo photosensitive materials, J...INO V recording materials, photosensitive resin materials, and others, but the ones that have been put into practical use as non-silver salt films are those made of diazo yarn. There are many. Diazo-based non-silver salt films have low optical density and poor stability over time. l"31jlt
It cannot be used as a substitute for silver halide film because it has the serious drawbacks of not being able to reduce the power and not being able to correct the tone of halftone dot 114 reproduction. There is also a material in which an aluminum metal is deposited on a transparent film, an image is formed on a photoresist on the transparent film, and then a gold-14 vapor layer is etched to form an image.

Although it is possible to reduce force with this material in principle, the rate of force reduction is extremely slow because etching is performed only from the side.
Furthermore, as the etching of the metal vapor deposited layer progresses, the photoresist layer peels off from the vapor deposition layer nonuniformly, resulting in unfavorable results such as deterioration of the halftone dot shape before the desired reduction amount is achieved. Not only that, but the photoresist (used for cars) has low sensitivity and is unstable over time, and the photoresist must be applied in a way that prevents pinholes from forming, making it expensive. However, it has the disadvantage of being priced at 1 hu.

On the other hand, when considering silver salt films that can be reduced in strength, it is generally found that silver salt films have good viscoelasticity because the blackened silver particles are retained in gelatin, and the reducing liquid is made of hydrophilic resin. This is because the silver imitation particles diffuse and penetrate into the gelatin, which is a liquid, and turn them into soluble silver salts. It is possible to bring about rapid change. Furthermore, gelatin has the role of adjusting the speed of diffusion and penetration of the force liquid to an appropriate value, and for that reason, it is necessary to reduce the force so slowly that it can be applied without checking the amount of force reduction. The adjustment is made so that the time required for the force reduction work is not too long, but not too long.

In addition, in silver salt films, impurities such as sulfur contained in extremely small amounts in gelatin are said to play a useful role in improving sensitivity, and there are many practical problems in replacing them with other hydrophilic resins. Unfortunately, it is f.

As a result of intensive research to improve the drawbacks of conventional non-silver salt and silver salt image forming materials as described above, the present inventors have developed Il! ! 1
This invention has completed the invention of the image form 5 which has a high optical density in the line part, can be reduced in intensity, has excellent stability over time, and is highly sensitive.

That is, the present invention provides an electrophotographic photoreceptor having an easily peelable material layer on its surface, which is charged with corona, imagewise exposed, and developed with an electrophotographic liquid toner to form a toner image on the photoreceptor. Next, if a light-shielding layer to be etched is provided on the substrate, the toner image is pressure-transferred to an image forming substrate, and the exposed portion of the layer to be etched is etched using the toner image as a resist to reduce the optical density in an f& pattern. The gist of this method is an image forming method characterized by forming an image using the following methods.

The present invention will be explained in more detail below using the figures.

A 4# electrophotographic photoreceptor having an easily peelable material layer on its surface is illustrated as a cross-sectional view in FIG.

The substrate 1 in FIG.
One material that can be used is an insulating material such as paper, glass, or plastic whose surface is subjected to non-electrical treatment or isoelectric material is laminated. In either case, it is desirable to have a 41-t structure so that the ground electrode can be easily removed from the photoisoelectric photosensitive layer, and any shape is acceptable as long as it is plate-like or circular.

The materials of photosensitive 117R2 include amorphous selenium, a composition of cadmium sulfide and a resin binder, a composition of zinc oxide and a resin binder, amorphous silicon, cadmium sulfide, cadmium sulfide and cadmium carbonate, and 1. ￥ J fat binder composition, etc. (1112, poly-
Any known electrophotographic photoreceptor that exhibits optical resistance can be used as a photoreceptor, such as a aged photoreceptor such as N-vinylcarbazole, or a single-residual separation type photoreceptor with a multilayer structure. The method, thickness, etc. may be in accordance with known conditions.

The material of the easily peelable first hard material layer 3 may be any material R that has peelability, such as silicone S, silicone S, etc.
+ Fat, fluororesin, amino alkyd 4MI If
, casein, etc. can be used. Silicone 46 (+li
Taking j as an example, I/1 addition type or condensation type &H
1J silicone rubber for release paper cured with a curing catalyst, silicone oil with -8i [() cured with an addition type curing catalyst such as chloroplatinic acid, silicone raw rubber, silicone rubber for release paper, etc. It is convenient to use a silicone resin cured by a known method, such as one obtained by perogicide vulcanization.When using the above-mentioned silicone resin, dilute the silicone resin stock solution to a concentration that is easy to apply, and add a curing agent. It is sufficient to apply the coating onto the photosensitive layer and cure it, and it may be applied by any method that allows uniform coating, such as wire bar coating, spin coating, roll coating, etc. Methods such as coach ink, spray coating, and dipping may be used.Other easily removable materials include fluororesin, especially polytetrafluoroethylene dispersion or enamel.Easy removability The releasability of the material layer is also affected by the smoothness of the surface of the photoconductive photosensitive head; if the surface is smooth, even a thin easily removable material layer will have sufficient removability, whereas if the surface is rough, the removability of the easily removable material will be sufficient. It is necessary to make the layer 1 thick. However, making the easily peelable material layer thicker than necessary causes deterioration of resolution, so the thickness of the layer is preferably 0.01 to 5 μm. From the above point of view, especially in the case of a binder-dispersed photoreceptor, it is preferable to keep the surface smooth.Also, in order to improve the adhesion between the photoconductive photosensitive layer and the easily peelable material layer, bufimer treatment is applied. may be applied.

In this case, the primers include vinyltrichlorosilane, vinyltriethoxysilane, vinyltris(β-methoxyethoxy)silane, γ-glycidoxypropyltrimethoxysilane, γ-methacryloxypropyltrimethoxysilane, N-β( aminoethyl)γ-aminopropyltrimethoxysilane, N-β(aminoethyl)γ
-aminopropylmethyldimethoxysilane, γ-gloropropyltrimethoxysilane, γ-mercaptopropyltrimethoxysilane.

Silanes such as γ-aminopropyltriethoxysilane, vinyltris(t-butylperoxy)silane alone or mixtures thereof, and their 813-minute hydrolysates or partial cohydrolysates; tetraisopropyl titanate, tetrabutyl titanate, Titanium orthoesters such as tetra-2-ethylhexyl titanate, titanium chelates such as titanium acetylacetonate and triethanolamine titanate, titanium acylates such as polyhydroxytitanium stearate and polyisopropoxytitanium stearate, and organic titaniums such as the above. Aluminum chelate compounds such as aluminum alcoholate, ethyl acetoacetate aluminum diisopropylate, aluminum isopropylate, mono-5SC-butoxyaluminum diisopropylate, aluminum diisopropylate, etc. , 4-aluminum compounds alone or mixtures thereof; other 1-metallic compounds; and mixtures of the above-mentioned silanes and metal compounds.

The coating method may be any method that can uniformly coat the coating, such as diluting it to an appropriate concentration as necessary, wire coating, rotating cloth, roll coating, spray coating, or dipping cloth.

An example of pressure transfer after forming a toner image with the wet toner described later using the Ichiko Photo A photoreceptor having an easily peelable material layer on the surface obtained after 7 hours is shown in FIGS. 2 to 2. It is shown in Fig. 5. For convenience of explanation, the electrification is shown as negative, but it goes without saying that the chargeability is determined by the type of light used and the type of photosensitive layer.

After applying a corona discharge charge to an electrophotographic photoreceptor having an easily peelable material layer on its surface by moving the corona discharge charge in the direction of the arrow using a corona discharge device 4, for example, as shown in FIG. As shown in FIG. 3, an electrostatic latent image is formed by exposing it to light in a pattern. The electrophotographic photoreceptor 11 and photoreceptor on which the static to wet image shown in FIG. After obtaining, using pressure roll 8 in Fig. 5,
The toner temporarily applied to the surface of the electrophotographic photoreceptor developed with the above toner is adhered to the surface of the layer to be etched of the image forming substrate, and then the image forming member is peeled off. Heating may be performed using any suitable means such as heating a roll or using a heater. In addition to the pressure roll indicated by 8 in FIG. 5, a flat press type press (2) can also be used, and when the wet toner of the present invention is used, the pressure is 1 to 200 MPlci, and the separation conditions are 30 to 250 °C. And it is sufficient.

As a liquid toner, [n
It is preferable to use one with good clarity, unlike those with 3"''j. This is used for image formation J1 (transferring a toner image onto the surface of the layer to be etched on the body, etching it to form an image, and then further reducing the force). This is because there are times when we do

Liquid toners generally contain pigments and/or dyes, various polymers of drying oil-modified algide resins containing dispersion medium-soluble and insoluble groups, charge control agents such as organic acid metal salts that are soluble in the dispersion medium, and isoparaffins. A condenser is prepared by milling a dispersion medium of high electric resistance and low rate of production, such as a petroleum solvent, using a ball mill, pebble mill, etc., and then diluting it with the above-mentioned dispersion medium.

As mentioned above, the fast-setting toner used in the present invention is preferably transparent, so the amount of the 41 color bodies such as the above pigments is reduced compared to the conventional one, or it is not added at all, or silicon dioxide, titanium dioxide, It is better to use a colorless extender pigment such as zinc oxide instead of a colored body.

More preferably, particles of an olefin resin having a carbonyl group as described below are used as toner particles.The olefin resin particles having a carbonyl group are those obtained by modifying a polyolefin resin and introducing a carboxyl group. and N Polymer manufactured by Nippon Petrochemical 0 (), Tonen Petrochemical (C), Tonen C) A P -HA series manufactured by L, MODIC manufactured by Mitsubishi Seikagaku 9, Tetsuko Kagaku Kogyo (Dekkun manufactured by INN, Mitsui Toatsu Chemical) Copolymers of ethylene and acrylic acid, Dow FAA copolymers manufactured by Dow Chemical Co., Ltd. Copolymers of ethylene and acrylic acid or methacrylic acid, etc. , or so-called ionomers made by cross-linking them; trade names include Surlyn manufactured by DuPont in the United States, Yaimilan manufactured by Mitsui Polychemicals Co., Ltd., Kobolene Latex manufactured by Asahi Dow 0D; copolymers of ethylene and vinyl acetate; In terms of product names, Ultrasen manufactured by Toyo Kaidatsu Kogyo ■, Sumitate manufactured by Sumitomo Chemical 9 (+1.), Yucalon-Epa manufactured by Mitsubishi Yuka Ind., Evaflex manufactured by Mitsui Polychemicals (A4i), Lparacts manufactured by DuPont, USA, etc.; Partially kephized cedar fu of co+11 combination of ethylene and vinyl acetate,
Product names include Dumilan manufactured by Narita Pharmaceutical Co., Ltd.; Copolymer of ethylene and acrylic ester; product names include DPD-6169 manufactured by Nippon Unicar (↑4.)
; or a carboxyl carbonyl group with T-J-, and the particle size is iD.
1zm or less, preferably 80.1 to 5μ, can be used, and the above can be used in combination with 1; l'iI or 2 or more.

As the electrically insulating liquid for dispersing the toner particles, known ones can be used, such as liquid n-paraffinic hydrocarbons, 1so-paraffinic hydrocarbons, or mixtures thereof, aliphatic hydrocarbons, aromatic hydrocarbons, etc. Hydrocarbons, halogenated aliphatic hydrocarbons, Shirogisanura, etc. are used, but in the present invention, the IM is designed to prevent dissolution of foreign substances as much as possible, that is, to maintain heat insulation and develop. The dissolving power is relatively small in order to prevent deterioration of the agent. 5 Stunning liquids, especially aliphatic hydrocarbons, especially 1so
- or n-paraffinic hydrocarbons are preferably used.

The above-mentioned olefin resin having a carbonyl group can be made into particles by any method, but for example, it may be finely pulverized using a pulverizer such as a ball mill or a jet mill. Preferably, the resin is embrittled. Cool to below temperature and crush, and as soon as possible after crushing. It may be solidified by cooling or by drying.

Alternatively, the temperature dependence of the solubility of the resin may be used to calculate the temperature dependence of the solubility of the resin, and the resin may be heated and dissolved in a solvent in advance, then rapidly cooled while stirring and solidified into fine particles. If the solvent used to dissolve the above-mentioned resin is not electrically insulating, it will be necessary to replace the solvent.

The particle size of the resin granulated by the above method varies depending on the degree of resolution required for the image obtained after development, but it is preferably an average particle size of 10 μIn or less, more preferably an average particle size of 5 μm to Q, 111 m. It is good as long as it has a certain particle size.

Furthermore, in the electric machinability A'1 body, a dispersant, a fixing agent,
ij', :1ill? For example, fatty acid salts or organic complex salts of transition metals can be used as the charge control agent, and as the constant T agent, the above-mentioned Takatomi f,, 1 !11 Various resins that are soluble in the body, such as sewing properties or 1 (alkyd resin of 14L,] ID regular acrylic JLA II''L7,
Synthetic rubber, polyalkylene oxide, polyvinyl acetal (including butyral), vinegar 1) tahiniru 1 co-i 11 (?) etc.
In addition to many anionic, cationic, amphoteric, or nonionic surface active f''E cuts, the above-mentioned ? d system 4i1
Among the 1 iI'll, it is possible to use fatty acid vinegar salt, and 1 among the fixatives;

If the resin particles in the liquid present agent prepared in this way are made into particles that are positively charged, for example, they will give a positive image in an electrophotographic photoreceptor used with a negative charge, such as a zinc oxide/resin photoreceptor. becomes.

FIG. 9 shows a cross-sectional configuration 1-1 of the I1I7I image forming substrate A of the present invention, in which a light-shielding etched +
(11 [+ is laminated.

The material of the substrate 9 can be selected depending on the intended use of the formed image. That is, when used as a transmission B-screen, transparent materials such as transparent inorganic materials such as glass, transparent molecular materials such as acrylic resin, polyethylene terephthalate, polypropylene, and triacedate are exemplified.

Further, when used for reading reflected light such as a reflective original, the above-mentioned transparent material, a colored version of the transparent material, paper, a metal plate, and other opaque additives can also be used as the substrate.

The layer 10 to be etched on the substrate 9 is made of gold hJi fine particles dispersed in a hydrophilic resin, and the size of the metal fine particles is o.
, ooiμ~10μ, preferably O,0571~5μ, and many metal types can be used, for example, Ni
, Ag, Ou, Al, I'i'e%Co, Au
, Sn%Pb, C1rZn, In, Si, Pt,
Fine particles of a single substance, a mixture, or an alloy of Pd or the like may be used. For example, by using a magnetic material such as Fe-Co or Fe-N1, a #llI densely patterned magnetic a7 layer can be obtained.

((, The role of the aqueous jl4 fat is to hold the metal particles and, as described later, to dissolve and bleach the metal particles.
Women's 2] is to help spread the word. Any material can be used as long as it fulfills this role.
For example, known hydrophilic molecular compounds can be used.

As a specific example, for example, 6g of cellulose::j
Examples include polyvinyl alcohol, polyvinyl alcohol containing unidentified vinyl alcohol units, gelatin, casein, etc., and can be subjected to hardening treatment if necessary.

The metal particles and the hydrophilic resin may be mixed and dispersed separately with r$ bias, or metal complex salts may be reduced to precipitate metal #vk particles.

The thickness of the material to be etched 11.jl[1 may be 0.1 to 50[beta], preferably 1 to 30[mu].

The degree of density of the fine metal particles containing 11・11θj2 may be uniform (t, 3 anti-distribution, but it may be necessary to obtain the desired QJ, similar characteristics or d characteristics). It is also possible to have a constant iG'1 degree distribution in the depth direction.Furthermore, the average particle size distribution of the original metal particles with the same intention may be varied in the depth direction to obtain desired developing characteristics or reducing force characteristics. be able to.

The amount of metal fine particles contained in the layer 10 needs to be increased or decreased depending on the desired optical a degree. Furthermore, the smaller the metal fine particle diameter, the fewer metal fine particles are required to achieve a desired optical density.

Transmission optical density +y4. .

It is preferable that the amount of metal fine particles to obtain t3 is 0.5 to 20 cm based on the volume percentage of the layer 10.
It may be dried, or it may be diluted in advance with an appropriate solvent to make it easier to apply. Any coating method may be used as long as it does not cause bubbles, streaks, or unevenness, and examples thereof include rod coating, rotating cloth, and roll coating.

In order to improve the adhesion between the layer 10 and the substrate, the surface of the substrate may be made hydrophilic or a single layer of primer may be provided.

Figure 6 shows the pressure rotation of the I toner image on the image forming substrate.
Figure 1.LC is shown. Toner and image f4 as needed! For the purpose of improving the formation J,':H(:i, and Todo1i',
Furthermore, a heating process 4 may be performed.

Next, as shown in No. 71z1, if you want hydrophilicity, 1) fat 1?
, 7, the metal fine particles contained in the portion 11 released by fL are dissolved. In order to dissolve metal particles, use alcohol-free alcohols such as hydrochloric acid, sulfuric acid, nitrogen, phosphoric acid, and carbonic acid, carboxylic acids such as acetic acid, and carboxylic acids such as sulfuric acid, phenols, and sulfuric acid.
F
Ammonium hydroxide, barium hydroxide, aqueous solutions of ammonium hydroxide 1Li (ammonia water), hydroxides of alkali metal elements and alkaline earth metal elements whose aqueous solutions are basic, sodium carbonate, carbonic acid Carbonates such as ammonium may be used alone or in combination of two or more.Also, as mentioned above (l!1), the alkali is usually used as an aqueous solution diluted to an appropriate concentration.

Also gold 1.・When using 4 fine particles, a known reducing agent such as Farmer reducing agent hVQ may be used.

The image forming material is immersed in γa, which is carried out by spraying a solution onto the image forming material. The temperature of the solution may be increased or decreased.

The solution permeates through the exposed surface of the hydrophilic resin and diffuses into the interior. The metal fine particles that come into contact with the dissolving solution are dissolved, forming a metal fine particle dissolving section 1'Oa and forming a transparent section.

Incidentally, the P section in FIG. 7 is a schematic diagram showing the optical density of the side material forming material of the present invention, and the vertical arrow indicates the optical density.

After dissolution, wash with water and dry.

FIG. 7 shows a cross-sectional view of the state of the combined fine particles after melting.

Although a sub-image is formed on the present R12II image forming material through the above steps, the advantage of this material is that it can be further applied to al. Fig. 8 shows a new product showing the true quality.In the process of reducing strength, the solution is partially applied to the area where reduction is required by dripping, coating, etc., and the required amount of metal fine particles is further applied.
Just dissolve it.

In the 81st series 1, iob indicates Hiroki So.

As explained in (H) below, according to the present invention, since a toner image is first formed using an electrophotographic method, the sensitivity is much higher than that of conventional non-silver single image formation fA materials using diazo photosensitive materials and photoresists. Whereas ultraviolet light, which is expensive and requires a screen size of 11"S, is used to expose diazo photosensitive materials, photoresists, etc., the present invention uses inexpensive visible light such as a tungsten lamp. It has the great advantage of being possible.

In addition, if an olefin resin having a carbonyl group is used as the toner material, it will have excellent contact with the image forming substrate.
Therefore, there is no need to provide a tangential layer on the surface of the image forming substrate.
It has the advantage that G' is simply l+11.

Furthermore, if development is carried out using fine particle liquid toner, the reciting force will be 7.5. Furthermore, since a pressure transfer method is used, there is no disturbance of the toner image during transfer, and the final image obtained has high resolution.

Since a layer of easily peelable material is provided on the surface of the photoconductor, the toner transferability is improved, and since the toner is almost completely transferred, it is easy to use even when the photoconductor is reused. No cleaning process is required.

Further, according to the present invention, there is an advantage that in the same process, a transmission image can be obtained by using a transparent material for the substrate of the image forming substrate, and a reflection image can be obtained by using a white or opaque material.

Furthermore, since electrophotography is used, a combination of toner left photoreceptors each charged with opposite polarity will produce a positive image.
A great advantage is that a negative image can be obtained by performing reversal development using toner and a photoreceptor centered with the same polarity.

In addition, according to the method of forming a metal layer in the present invention, there is no need to use silver as the metal fine particles contained in the layer to be etched, and it is possible to use base metal, which is inexpensive.
Furthermore, the optical density of the image area can be arbitrarily selected by adding several metal particles or by selecting the thickness of the hydrophilic resin layer containing gold I!, 4 fine particles. By increasing the optical density, 11J can be obtained as a lithium film substitute 4). Furthermore, an important advantage of the present invention is that it is possible to partially or totally reduce the force after forming both edges, and this operation, combined with the ability to increase the optical density of the image area, In the retouching department of commercial printing (+, 14 days 1
This means that it can be done.

To be more specific, the image forming material of the present invention has similar reducing force characteristics to that of a silver halide film because the line portion has Jin Minzhuo-6 in a hydrophilic resin similar to that of a silver halide film. have Also, unlike silver halide film, II! ii Since the surface of the line area is covered with toner, the size of the halftone dot does not change due to the reduction in force, and -IJ↓ of the entire image area decreases uniformly. It has a great advantage over conventional silver halide films in that it is possible to reduce the size of halftone dots while maintaining maximum density.

Next, examples of the present invention will be described, but it should be noted that they do not limit the scope of the present invention.

Example 1 Average NeΔγ diameter 5. ．． O o X fine iron powder (manufactured by Vacuum Metallurgy ■) was added at a volume ratio of 2q6 and was well dispersed. This material was coated on a 50 μm thick transparent polyethylene terephthalate film using a wire bar C- and dried. The dry coating thickness was 15B.

This material was used as an image forming substrate.

On the other hand, a photoreceptor having an easily peelable layer was prepared as follows.

After ultrasonic dispersion of the zinc oxide/resin liquid with the above composition, incyanate (Coronate 2031 Nippon Polycretan Industries θ
67 parts (made of cotton) were added and stirred, and the mixture was coated on a degreased aluminum plate so that the thickness of the dry mold was 15 μm, and dried.

Then as a primer, was washed with C.2 cloth and dried at 100° () for 20 minutes.

As a rough, easy-to-peel IF11 appetizer, q4 was placed on a cloth and heated at 100° for 60 minutes to create a j1-name Hikari with easy-to-peel I-.

On the other hand, the toner was prepared as follows.

was heated to 8Q''G to dissolve the above resin, and then rapidly cooled to 1o'C with strong stirring, solidifying it into translucent particles. While continuing stirring, isoparaffin (Isopar H, Exxon Chemical (Warisaki) 2 When n D frB was introduced into it, the particles became opaque and settled to the bottom of the container when stirring was stopped.

The supernatant was removed and isoparaffin was added repeatedly to lower the tonorenine concentration in the solvent.

The wet toner thus obtained has an average particle size of approximately 1 μm.
The particle size distribution was narrow. The precipitated toner was easily redispersed by stirring (two steps were required). Even after one month of production, there was no change in particle size and no agglomeration and cake formation occurred. The toner particles were positively charged.

As described above (2), the resulting photosensitive plate was charged with negative corona, and a half-tone positive transmission original with a screen frequency of 150 lines/inch was secretly numbered.
After being exposed to light for 5 seconds at an illuminance of 300 lux, the liquid toner was developed, air-dried, and then placed in close contact with the image forming substrate at a temperature of 30°C.
°0, EE force 4 Q R,y/ci, conveyance speed 11
When the toner was transferred by applying pressure with CI-1 at f 57+1 /min, the toner was clearly transferred to the imaging substrate.

Next, this was immersed in a 596 hydrochloric acid aqueous solution for 1 minute, and the iron fine powder in the portion not covered with the toner was eluted.

After drying with 1) 1U of water and comparing it with the original, a halftone dot positive with an optical transmittance a of 2.5 was obtained, with the halftone dot shape having returned.

Example 2 Apply Farmer's reducing liquid contained in degreasing solution A to a part of the net bojichip obtained in Example 1, rinse with running water, judge the reducing force, and repeat this operation to reduce the effect. When I did this,
A force jet with σ1 equivalent to that of a silver halide film was obtained.

Examples Next group) Gelatin from J Father A was coated on a transparent polyethylene terephthalate film with a thickness of 100 μm using a wire bar and dried so that the dry film thickness was 5 μm.

(Silk adult) Gelatin 30% aqueous solution 10P palladium chloride hydrochloric acid aqueous solution 2DPJiuf palladium 0
．． Section 1” in! 1 φ stannous chloride hydrochloric acid aqueous solution 10% stannous chloride hydrochloric acid 1 tiglutaraldehyde 50% aqueous solution'0.55'
40, 55' Next, this film was immersed in a nickel salt aqueous solution having the following composition for about 1 minute to form fine metal nickel particles in the gelatin on the film.

(Composition) Nickel sulfate 2rJP/, 1゜Potassium sodium tartrate 40 1Sodium borohydride 2.31PH (adjusted by 1oH)
1 2.5 #Temperature
The optical transmission density of the film from 40 to 50' is 3.9
Therefore, Ni precipitation is approximately 1% by volume relative to gelatin.
[]%Met. This film was used as an image forming substrate.

Thereafter, an image was formed in the same steps as in Example 1. A well-shaped halftone image with a transmission density of 3.9 at halftone dots was obtained.

'i1. itJ Example 4 A Panacopy film (manufactured by Matsushita Electric Industrial Co., Ltd. (4W)) was used as an electrophotographic photoreceptor, and the same primer and easy-peel layer as in Example 1 were provided on the surface of the film. A photoreceptor with the following was created.

This photosensitive plate was positively charged with corona, and the light was analyzed in the same manner as in Example j1.

Next, reversal development was performed using the positively charged liquid toner shown in Example 1, and a negative toner image was obtained on the photosensitive plate.

On the other hand, gelatin having the composition A shown in Example 3 was coated on baryta paper with a wire bar and dried to a dry film thickness of 5 μm, and a nickel salt aqueous solution having the composition shown in Example 6 was used in Example 3. In the same manner as above, Ni ql'<particles were precipitated to prepare an image forming substrate.

This old (J! shape) substrate was brought into close contact with the above-mentioned toner image, and the temperature was 60°C and the pressure was 30 to 7/cm using a flat pressure press with 1 flame.
'', when the toner image was transferred to the image forming substrate with a compression time of 30 seconds, the toner image was completely Ii!II image form lJ',
: Transferred to the substrate.

Next, etching was performed in the same process as in Example 1 to obtain a negative mesh image.

[Brief explanation of the drawing]

FIG. 1 is a cross-sectional view of the electrophotographic photoreceptor used in the present invention, and FIG.
The figure is a cross-sectional view of the image forming substrate used in the present invention, Figures 2 to 6 are cross-sectional views showing the steps of the method of the present invention, and Figures 7 and 8 are cross-sectional views showing the steps of the method of the present invention. and is a graph showing optical density. 1・・・・・・・・・・・・・・・Board 2...
・・・・・・・・・・・・・・・Electronic photography! ) & light layer 3
・・・・・・・・・・・・・・・Easy peeling AJ4・
・・・・・・・・・・・・・・・・・・Corona charger 5・
・・・・・・・・・・・・・・・・Electron; h'6・・
・・・・・・・・・・・・・・・Active light 7・・・・・・
・・・・・・・・・・・・Toner zu ni 8・・・・・・
・・・・River・・・・・・Pressure roll 9・・・・・・・・・
River... Board 10... River...
...Etched layer 1 Figure 2 Figure = A-8 Figure 'lr4 Figure 6 Figure Oe Figure 8 Figure Fang 0 Figure

Claims (3)

[Claims] (1) Electronic copy N with the order of easily insulting materials in table jh1
Coronalize the photoreceptor, apply lJW image A light, develop with a liquid toner for military use to form a toner image on the photoreceptor, and then scan the toner image on a diagonal plate. Pressure is applied to a circular image forming substrate provided with a layer to be etched, and the toner image is used as a resist to etch the protrusion of the IM to be etched to reduce the optical density in a quadratic pattern to form a 1IIjl image. A method of forming Ryoichi East, which is characterized by ripping. (2) The toner particles of the liquid toner for throat/child photography tools are characterized in that they are olefin-based side fats having carbonyl occlusions.
k method. (3) Patent H'lf water range No. 1 (1) characterized in that the layer to be etched contains metal particles and has a hydrophilicity value j.
1111 image forming method described in item ) or item (2).